A store currently charges the same price for each towel that it sells. If the current price of each
towel were to be increased by $1, 10 fewer of the towels could be bought for $120, excluding
sales tax. What is the current price of each towel?
A) $1 B) $2 C) $3 D) $4 E) $12

Today's high school students are not being educated, they are being trained. Their teachers
demand little of them other than that they memorize facts and follow directions. The current
emphasis on training in basic math and verbal skills, while a useful step, rarely leads to the
essential second step: development of independent critical thinking. The author would probably
consider which of the following aspects of a student's term paper to be most praiseworthy?
A. The choice of a challenging topic
B. The use of grammatically correct sentence structure
C. Evidence of extensive research prior to writing
D. Avoidance of clichés and vagueness
E. Evidence of original insights and freshly developed concepts

THANKS!

Mình xin giải bài 1 vì bài 2 là bài không liên quan đến toán :D
ĐỀ:Một cửa hàng bán những cái khăn với cùng 1 giá. Giá hiện tại của mỗi cái khăn mà tăng lên 1 $ thì sẽ có ít hơn 10 cái khăn đc mua với 120 $ ,chưa tính thuế doanh thu. Hỏi giá hiện tại của mỗi chiếc khăn?
Solution:
Give x the sum of towels can be bought with 120$ at the current price (x € N, x>10) (*)
=> x-10 is the sum of towels can be bought with 120$ at the later price which 1$ more than the current price.
So we have the epuation:
120/x + 1 = 120/(x-10)
<=> ..... <=> x² -10x -1200 = 0
<=> (x+30)(x-40) = 0
<=> x = 40 (satisfy the condition (*))
=> The current price of every towel is: 120/40 = 3 $